
import matplotlib.pyplot as plt
import numpy as np

n = 1024
X = np.random.normal(0,1,n)
Y = np.random.normal(0,1,n)

# cx = np.random.normal(-5,5,n)
# cy= np.random.normal(0,1,n)

T = np.arctan2(X,Y)

plt.scatter(X,Y,s=75,c=T,alpha=0.5)
plt.xlim((-1.5,1.5))
plt.ylim((-1.5,1.5))

plt.xticks(())
plt.yticks(())


plt.show()